package cn.xhh.dailyreview.client.utils;

import cn.xhh.dailyreview.client.Service;
import cn.xhh.dailyreview.client.ServiceAsync;

import com.extjs.gxt.ui.client.core.FastMap;
import com.extjs.gxt.ui.client.widget.Info;
import com.extjs.gxt.ui.client.widget.MessageBox;
import com.google.gwt.core.client.GWT;
import com.google.gwt.http.client.URL;

public class ClientUtil {

	/*--------------------------------------------------------------------------
	 *  Copyright 2008 Taro L. Saito
	 *
	 *  Licensed under the Apache License, Version 2.0 (the "License");
	 *  you may not use this file except in compliance with the License.
	 *  You may obtain a copy of the License at
	 *
	 *     http://www.apache.org/licenses/LICENSE-2.0
	 *
	 *  Unless required by applicable law or agreed to in writing, software
	 *  distributed under the License is distributed on an "AS IS" BASIS,
	 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 *  See the License for the specific language governing permissions and
	 *  limitations under the License.
	 *--------------------------------------------------------------------------*/
	//--------------------------------------
	// XerialJ
	//
	// Moved from MD5.java
	// Since: 2008/06/23 19:39:34
	/**  MD5 digest algorithm */
	public static native String md5(String string) /*-{

	    function RotateLeft(lValue, iShiftBits) {
	    	return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits));
	    }

		function AddUnsigned(lX,lY) {
		    var lX4,lY4,lX8,lY8,lResult;
		    lX8 = (lX & 0x80000000);
		    lY8 = (lY & 0x80000000);
		    lX4 = (lX & 0x40000000);
		    lY4 = (lY & 0x40000000);
		    lResult = (lX & 0x3FFFFFFF)+(lY & 0x3FFFFFFF);
		    if (lX4 & lY4) {
		    	return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
		    }
		    if (lX4 | lY4) {
			    if (lResult & 0x40000000) {
			    	return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
			    } else {
			    	return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
			    }
		    } else {
		    	return (lResult ^ lX8 ^ lY8);
		    }
	    }

	    function F(x,y,z) { return (x & y) | ((~x) & z); }
	    function G(x,y,z) { return (x & z) | (y & (~z)); }
	    function H(x,y,z) { return (x ^ y ^ z); }
	    function I(x,y,z) { return (y ^ (x | (~z))); }

	    function FF(a,b,c,d,x,s,ac) {
		    a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
		    return AddUnsigned(RotateLeft(a, s), b);
	    };

	    function GG(a,b,c,d,x,s,ac) {
		    a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
		    return AddUnsigned(RotateLeft(a, s), b);
	    };

	    function HH(a,b,c,d,x,s,ac) {
		    a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
		    return AddUnsigned(RotateLeft(a, s), b);
	    };

	    function II(a,b,c,d,x,s,ac) {
		    a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
		    return AddUnsigned(RotateLeft(a, s), b);
	    };

	    function ConvertToWordArray(string) {
			    var lWordCount;
			    var lMessageLength = string.length;
			    var lNumberOfWords_temp1=lMessageLength + 8;
			    var lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 % 64))/64;
			    var lNumberOfWords = (lNumberOfWords_temp2+1)*16;
			    var lWordArray=Array(lNumberOfWords-1);
			    var lBytePosition = 0;
			    var lByteCount = 0;
			    while ( lByteCount < lMessageLength ) {
				    lWordCount = (lByteCount-(lByteCount % 4))/4;
				    lBytePosition = (lByteCount % 4)*8;
				    lWordArray[lWordCount] = (lWordArray[lWordCount] |
						(string.charCodeAt(lByteCount)<<lBytePosition));
				    lByteCount++;
			    }
			    lWordCount = (lByteCount-(lByteCount % 4))/4;
			    lBytePosition = (lByteCount % 4)*8;
			    lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80<<lBytePosition);
			    lWordArray[lNumberOfWords-2] = lMessageLength<<3;
			    lWordArray[lNumberOfWords-1] = lMessageLength>>>29;
			    return lWordArray;
	    };

	    function WordToHex(lValue) {
		    var WordToHexValue="",WordToHexValue_temp="",lByte,lCount;
		    for (lCount = 0;lCount<=3;lCount++) {
			    lByte = (lValue>>>(lCount*8)) & 255;
			    WordToHexValue_temp = "0" + lByte.toString(16);
			    WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length-2,2);
		    }
		    return WordToHexValue;
	    };

	    function Utf8Encode(string) {
		    string = string.replace(/\r\n/g,"\n");
		    var utftext = "";
	
		    for (var n = 0; n < string.length; n++) {
	
			    var c = string.charCodeAt(n);
		
			    if (c < 128) {
			    	utftext += String.fromCharCode(c);
			    }
			    else if((c > 127) && (c < 2048)) {
				    utftext += String.fromCharCode((c >> 6) | 192);
				    utftext += String.fromCharCode((c & 63) | 128);
			    }
			    else {
				    utftext += String.fromCharCode((c >> 12) | 224);
				    utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				    utftext += String.fromCharCode((c & 63) | 128);
		    	}
	
		    }
	
		    return utftext;
	    };

	    var x=Array();
	    var k,AA,BB,CC,DD,a,b,c,d;
	    var S11=7, S12=12, S13=17, S14=22;
	    var S21=5, S22=9 , S23=14, S24=20;
	    var S31=4, S32=11, S33=16, S34=23;
	    var S41=6, S42=10, S43=15, S44=21;

	    string = Utf8Encode(string);

	    x = ConvertToWordArray(string);

	    a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;

	    for (k=0;k<x.length;k+=16) {
		    AA=a; BB=b; CC=c; DD=d;
		    a=FF(a,b,c,d,x[k+0], S11,0xD76AA478);
		    d=FF(d,a,b,c,x[k+1], S12,0xE8C7B756);
		    c=FF(c,d,a,b,x[k+2], S13,0x242070DB);
		    b=FF(b,c,d,a,x[k+3], S14,0xC1BDCEEE);
		    a=FF(a,b,c,d,x[k+4], S11,0xF57C0FAF);
		    d=FF(d,a,b,c,x[k+5], S12,0x4787C62A);
		    c=FF(c,d,a,b,x[k+6], S13,0xA8304613);
		    b=FF(b,c,d,a,x[k+7], S14,0xFD469501);
		    a=FF(a,b,c,d,x[k+8], S11,0x698098D8);
		    d=FF(d,a,b,c,x[k+9], S12,0x8B44F7AF);
		    c=FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);
		    b=FF(b,c,d,a,x[k+11],S14,0x895CD7BE);
		    a=FF(a,b,c,d,x[k+12],S11,0x6B901122);
		    d=FF(d,a,b,c,x[k+13],S12,0xFD987193);
		    c=FF(c,d,a,b,x[k+14],S13,0xA679438E);
		    b=FF(b,c,d,a,x[k+15],S14,0x49B40821);
		    a=GG(a,b,c,d,x[k+1], S21,0xF61E2562);
		    d=GG(d,a,b,c,x[k+6], S22,0xC040B340);
		    c=GG(c,d,a,b,x[k+11],S23,0x265E5A51);
		    b=GG(b,c,d,a,x[k+0], S24,0xE9B6C7AA);
		    a=GG(a,b,c,d,x[k+5], S21,0xD62F105D);
		    d=GG(d,a,b,c,x[k+10],S22,0x2441453);
		    c=GG(c,d,a,b,x[k+15],S23,0xD8A1E681);
		    b=GG(b,c,d,a,x[k+4], S24,0xE7D3FBC8);
		    a=GG(a,b,c,d,x[k+9], S21,0x21E1CDE6);
		    d=GG(d,a,b,c,x[k+14],S22,0xC33707D6);
		    c=GG(c,d,a,b,x[k+3], S23,0xF4D50D87);
		    b=GG(b,c,d,a,x[k+8], S24,0x455A14ED);
		    a=GG(a,b,c,d,x[k+13],S21,0xA9E3E905);
		    d=GG(d,a,b,c,x[k+2], S22,0xFCEFA3F8);
		    c=GG(c,d,a,b,x[k+7], S23,0x676F02D9);
		    b=GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);
		    a=HH(a,b,c,d,x[k+5], S31,0xFFFA3942);
		    d=HH(d,a,b,c,x[k+8], S32,0x8771F681);
		    c=HH(c,d,a,b,x[k+11],S33,0x6D9D6122);
		    b=HH(b,c,d,a,x[k+14],S34,0xFDE5380C);
		    a=HH(a,b,c,d,x[k+1], S31,0xA4BEEA44);
		    d=HH(d,a,b,c,x[k+4], S32,0x4BDECFA9);
		    c=HH(c,d,a,b,x[k+7], S33,0xF6BB4B60);
		    b=HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);
		    a=HH(a,b,c,d,x[k+13],S31,0x289B7EC6);
		    d=HH(d,a,b,c,x[k+0], S32,0xEAA127FA);
		    c=HH(c,d,a,b,x[k+3], S33,0xD4EF3085);
		    b=HH(b,c,d,a,x[k+6], S34,0x4881D05);
		    a=HH(a,b,c,d,x[k+9], S31,0xD9D4D039);
		    d=HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);
		    c=HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);
		    b=HH(b,c,d,a,x[k+2], S34,0xC4AC5665);
		    a=II(a,b,c,d,x[k+0], S41,0xF4292244);
		    d=II(d,a,b,c,x[k+7], S42,0x432AFF97);
		    c=II(c,d,a,b,x[k+14],S43,0xAB9423A7);
		    b=II(b,c,d,a,x[k+5], S44,0xFC93A039);
		    a=II(a,b,c,d,x[k+12],S41,0x655B59C3);
		    d=II(d,a,b,c,x[k+3], S42,0x8F0CCC92);
		    c=II(c,d,a,b,x[k+10],S43,0xFFEFF47D);
		    b=II(b,c,d,a,x[k+1], S44,0x85845DD1);
		    a=II(a,b,c,d,x[k+8], S41,0x6FA87E4F);
		    d=II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);
		    c=II(c,d,a,b,x[k+6], S43,0xA3014314);
		    b=II(b,c,d,a,x[k+13],S44,0x4E0811A1);
		    a=II(a,b,c,d,x[k+4], S41,0xF7537E82);
		    d=II(d,a,b,c,x[k+11],S42,0xBD3AF235);
		    c=II(c,d,a,b,x[k+2], S43,0x2AD7D2BB);
		    b=II(b,c,d,a,x[k+9], S44,0xEB86D391);
		    a=AddUnsigned(a,AA);
		    b=AddUnsigned(b,BB);
		    c=AddUnsigned(c,CC);
		    d=AddUnsigned(d,DD);
	    }

	    var temp = WordToHex(a)+WordToHex(b)+WordToHex(c)+WordToHex(d);

	    return temp.toLowerCase();
	}-*/;

	public static FastMap<String> parseToken(String token) {
		if (token == null) return null;
		
		token = URL.decode(token);
		FastMap<String> params = new FastMap<String>();
		String[] pArr = token.split("&");
		for (String pair : pArr) {
			String key, value;
			int pos = pair.indexOf('=');
			if (pos < 0) {
				key = pair.trim();
				value = "";
			} else {
				key = pair.substring(0, pos).trim();
				value = pair.substring(pos + 1).trim();
			}
			if (ClientUtil.notBlank(key))
				params.put(key, value);
		}
		
		return params;
	}

	static final ServiceAsync service = GWT.create(Service.class);

	public static ServiceAsync getService() {
		return service;
	}

	/**
	 * Check if the given string is <b>blank</b>: <code>null</code> or contains only space characters.
	 * @param str the string to check
	 * @return <code>true</code> if the given string is blank, <code>false</code> otherwise
	 */
	public static boolean isBlank(String str) {
		return str == null || "".equals(str.trim());
	}

	/**
	 * Check if the given string is not blank.
	 * @param str the string to check
	 * @return !{@link isBlank}
	 */
	public static boolean notBlank(String str) {
		return !isBlank(str);
	}

	/**
	 * Display a modal dialog for alert with the given message,
	 * using MessageBox.alert from GXT.
	 * @param msg the message to show in the dialog's body
	 */
	public static void alert(String msg) {
		MessageBox.alert("", msg, null);
	}

	/**
	 * Display a modal dialog for information with the given message,
	 * using MessageBox.info from GXT.
	 * @param msg the message to show in the dialog's body
	 */
	public static void info(String msg) {
		MessageBox.info("", msg, null);
	}

	/**
	 * Display the message using Info.display with an empty title and the given message as the body text.
	 * @param msg
	 */
	public static void flash(String msg) {
		Info.display(msg, "");
	}

	public static final String REG_EXP_EMAIL = "[\\w.]+@\\w{1,64}\\.[a-zA-Z]{2,6}";

}